Build your custom exhaust system or replace failing components on your 2001-2004 GM 6.6L Duramax with the MBRP GMS9401 Stainless Steel Front Pipe. The GMS9401 front-pipe features a 4" mandrel-bent design for enhanced flow and a stainless steel construction for corrosion resistance.
- 4" Front Pipe
- 4-Bolt Flanged End Connection
- T409 Stainless Steel Construction